Jobs at Matterhaul

• Design and build backend services and APIs using Effect.js, TypeScript, and PostgreSQL (Drizzle ORM)

Own our infrastructure: Railway deployments, ECR/Docker CI/CD with GitHub Actions, monitoring (Sentry), and feature flags (Statsig)
Architect and maintain our auth and authorization stack: Clerk for identity, OpenFGA for fine-grained ReBAC, with tuple syncing and policy enforcement
Build and improve our testing infrastructure, including Testcontainers-based integration tests and evaluation pipelines
Design data models and migrations for a multi-tenant SaaS platform with complex domain entities (products, quotes, orders, customers, communications)
Work on real-time sync infrastructure using ElectricSQL and TanStack DB for local-first data patterns
Manage our monorepo (pnpm + Nx), build tooling, and developer experience across the team
Collaborate on system design for inbound email processing, ERP integrations, and webhook-driven workflows

• Design, build, and iterate on our sales order extraction pipeline—parsing unstructured sales orders (PDFs, emails, EDI) into structured, enriched data

Build and maintain entity resolution and product matching systems using a combination of embeddings, full-text search, and knowledge graph lookups
Architect agentic loops and multi-step AI workflows (e.g., quote generation, order validation, customer communication) using state machine patterns
Design and run evals: build gold datasets, define metrics, run experiments, and use tooling like LangSmith to measure and improve model performance
Develop and refine our domain-specific ontology to power structured reasoning over construction products, suppliers, and transactions
Integrate and orchestrate LLM calls across the product, including prompt design, output parsing, and fallback handling
Collaborate closely with the founding team on product direction and customer feedback loops
Fine tune models for specific tasks
Build and maintain production observability for our AI pipelines